maths
Calculate the area of the following triangles, giving your answers to 2 decimal places: (a) The right-angled triangle with sides a=16, b=63, and c=65. (b) The triangle with angle ? = 40° and adjacent sides b=10 and c=20.November 18, 2016

Algebra
There are 3 red chips and 2 green chips. You win the game if you take out all the chips of the same color. What is the probability you take all the green chips out?November 16, 2016

Algebra
In a set of 6 numbers, {-2, -1, 0, 1, 2, 3}, what is the probability the product of any two numbers is zero?November 16, 2016

math
A 5.35 kg steel block is spun around a motor at 36.5 rpm. The angular acceleration of the block is -2.14 rads/s^2 and it takes 1.79 s for the block to come to a complete stop. What is the angular displacement while the block slows to a stop?October 23, 2016

Statistics
a ball rolls off a table and falls 0.80 m to the floor, landing with a speed of 4.5 m/s. 1. What was the initial speed of the ball? 2. What initial speed must the ball have if it is to land with a speed of 5.8 m/s? 3. What is the magnitude of the acceleration of the ball just ...October 9, 2016

Chemistry
How would one work through this problem? -Calculate the number of liters of 1.25M solution that can be made from 6.400g of barium nitrate. - I know that it's just stoichiometry, but I'm confused. The formula for molarity is the number of moles of the solute divided by ...May 7, 2016

Chemistry
What volume of coffee (pH =5.0) would be required to have .25 moles of H3O+ ions? (Hint: two step)April 25, 2016

life orientation
she should go through it cautiously and be smart about it. don't try to fix it then and there, do it gradually so she can get it done alright and efficiently. don't try to push itFebruary 25, 2016

Geometry
WHICH STATEMENT IS TRUE? a) a right angle has a complement b)and obtuse angle has a complement c)the supplement of a right angle is a right angle d) every angle has a supplement****February 24, 2016

math
Erica started her own pizza restaurant. She offers one type of crust, one kind of sauce and 6 different toppings: sausage, pepperoni, mushroom, onions, green peppers and tomatoes. 1. How many different two-topping pizzas can she make? 2. Erica decides to offer three kinds of ...February 20, 2016

Check 2 of my world history answers??
star* by my answer 2. All of the following are considered causes of the Great Depression EXCEPT Problems in Agriculture** Uneven distribution of wealth Lack of stock available 7. Hoover believed in which of the following strategies to end the Great Depression? Volunteerism and...January 21, 2016

PLEASE CHECK MY WORLD HISTORY ANSWERS
star* by my answers 1. This man became President after the 1928 election and became the "face" of the Great Depression in the United States. Theodore Roosevelt Woodrow Wilson Herbert Hoover** 2. All of the following are considered causes of the Great Depression ...January 21, 2016

Check my world history answers??
star* by my answers 1. This man became President after the 1928 election and became the "face" of the Great Depression in the United States. Theodore Roosevelt Woodrow Wilson Herbert Hoover** 2. All of the following are considered causes of the Great Depression ...January 21, 2016

World history/ Latin America
1. The policy by which strong nations extend their control and influence over weaker territories is called? Socialism Imperialism * Populism 2. This theory justified the use of racial, national and cultural superiority that nations used to build their empires? Populism * ...January 17, 2016

World history/ Latin America
Check my answers please?? i have a star by my answer. 1. The policy by which strong nations extend their control and influence over weaker territories is called? Socialism Imperialism Populism 2. This theory justified the use of racial, national and cultural superiority that ...January 17, 2016

maths
there are 12 sweets in a bag. 7 of the sweets are strawberry flavou. 5 of the sweets are lime flavour. harriet takes 2 sweets at random work out the probability that she takes at least one strawberry sweet.January 14, 2016

History
can you check a few more?? 8. How did mass culture develop in America during the late 1800s? Through television and variety shows like "I Love Lucy" Through the use of the internet. Because of the development of transportation, advertising, and communication.* ...December 1, 2015

History
check my answers??? star* is by my answer 1. Historians (and specifically Mark Twain) depict the last few decades of the nineteenth century as what age? Ice Age Gilded Age* Age of Discovery Age of Empires 2. Literature became a major part of American culture during the Gilded ...December 1, 2015

History
8. How did Native Americans and whites differ in their views on land use? * Native Americans saw themselves as part of nature and considered it sacred, while whites saw it as a natural resource used to produce wealth. Indian cultures had no regard for preserving land and were ...December 1, 2015

History
check my answers??? 1. During Reconstruction, Southern agriculture thrived because it became more diverse and expanded with the diminishing demand for cotton and tobacco. * True* or False 2. Identify the factor which helped limit the economic recovery of the South following ...December 1, 2015

Algebra
An algebra teacher is writing a test. There will be two types of questions: multiple-choice and open-ended. The multiple-choice questions take 3 minutes to complete and the open-ended questions take 12 minutes to complete. There must be at least 3 open-ended questions, at ...September 8, 2015

Math
If a 20 inch pully runs at 350rpms, what size does the second pully have to be to run at 3500rpms? I Don't remember the equation all I am looking for is the equation pleaseSeptember 2, 2015

Physics
An object fired at an angle of 31.9° above the horizontal takes 2.55 s to travel the last 15.5 m of its vertical distance and the last 10.5 m of its horizontal distance. With what speed was the object launched? (Note: This problem does not stipulate that the initial and ...February 1, 2015

Math
Check my math please... is the probability of three events with the following individual probs: 1/161x10/100x20/100=0.00012; and that is a 0.012% (1.2%) chance? ThanksJanuary 24, 2015

physics
Fall time under g is sqrt 2h/g. Can someone give a derivation from the equations of motion please? Thanks.December 17, 2014

Physics
1) Planet Zero has a mass of 5.0*10^23 kg and a radius of 2.0*10^6 meters. What is the acceleration of gravity on planet zero? 2)Phobos, a satellite of Mars, has a radius of 11km and a mass of 10^16 kg. Its a bit lumpy, but let's assume its spherical to get a doable ...December 6, 2014

Physics
1) Planet Zero has a mass of 5.0*10^23 kg and a radius of 2.0*10^6 meters. What is the acceleration of gravity on planet zero? 2)Phobos, a satellite of Mars, has a radius of 11km and a mass of 10^16 kg. Its a bit lumpy, but let's assume its spherical to get a doable ...December 6, 2014

Physics
1) Determine the force of gravitational attraction between the earth(m=5.98*10^24kg) and a 70-kg physics student if the student is in an airplane at 4.950 meters above the earth's surface.December 6, 2014

algebra
a grocery store has 116 bags of marshmallows. over 6 months, it sells 8 bags of marshmallows per month. how many marshmallows are in inventory at the end of 6 months?December 2, 2014

math
A street light is at the top of a 16.0 ft. tall pole. A man 5.9 ft tall walks away from the pole with a speed of 5.5 feet/sec along a straight path. How fast is the tip of his shadow moving when he is 47 feet from the pole?November 12, 2014

math
Water is leaking out of an inverted conical tank at a rate of 6700 cubic centimeters per minute at the same time that water is being pumped into the tank at a constant rate. The tank has height 6 meters and the diameter at the top is 3.5 meters. If the water level is rising at...November 12, 2014

Physics
A father pulls his son, whose mass is 26.7 kg and who is sitting on a swing with ropes of length 3.27 m, backward until the ropes make an angle of 35.6° with respect to the vertical. He then releases his son from rest. What is the speed of the son at the bottom of the ...October 21, 2014

Physics
A father pulls his son, whose mass is 26.7 kg and who is sitting on a swing with ropes of length 3.27 m, backward until the ropes make an angle of 35.6° with respect to the vertical. He then releases his son from rest. What is the speed of the son at the bottom of the ...October 21, 2014

Physics
A 25.0-g metal cylinder is placed on a turntable, with its center 70 cm from the turntable's center. The coefficient of static friction between the cylinder and the turntable's surface is μs = 0.71. A thin, massless string of length 70 cm connects the center of ...October 7, 2014

math
WOW! Thanks, I had trouble setting up the equation to solve. But it makes sense, like when solving an interest problem.July 8, 2014

math
It is important for Bob to have a gross salary in his fifth year of at least $100,000. He is promised salary increases of 3 percent per year in the second and third years and 5 percent thereafter. What must be his starting salary be to achieve his goal? My original answer was...July 8, 2014

math
Thank you.That one had me stumped, but the way you explained it makes sense. 0.4%July 8, 2014

math
In order for a spacecraft to reach Earth's orbital velocity, it must achieve a speed of 17,500 mph in 610 seconds after its first stage burnout where it should have achieved a speed of 1530 mph. What percent increase in speed per second is necessary after first stage in ...July 8, 2014

math
Got it. 8 quarters, 17 dimes, and 35 nickels. Thanks for the equations, that was what I had trouble setting up.July 7, 2014

math
There are 60 coins in a box containing only nickels, dimes, and quarters. If there is one more than twice as many dimes as quarters, and the total value of all dimes is five cents less than the total value of all nickels, how many of each denomination are in the box?July 7, 2014